Coal from Pakawan
before 1868
Alloy of 47 copper and 53 antimony
before 1889
Coal from Acvere River
before 1868
Gunmetal casting, split in the middle
before 1889
Samples of Muntz metal bolts, showing a central core
before 1889
Action of organisms on Muntz metal in sea water
before 1889
Result of heating four equivalents of litharge with one of arsenious acid
before 1889
Swedish sheet copper, from the International Exhibition, 1862
before 1862
Furnace product
1842
Result of heating four equivalents of litharge with one of antimony
before 1889
Broken screws showing molecular changes in Muntz metal under strain
before 1889
Electrotype copper
before 1889
Result of heating eight parts of litharge with one of red haematite
before 1889
Result of heating three parts of litharge with one of red haematite
before 1889
Result of heating two parts of litharge with one of red haematite
before 1889
Ships' nails from bottom of a ship after eighteen months voyage to India and back
before 1889
Silicate with sand uncombined
before 1889
Lead reduced by antimony
before 1889
Sample of copper sheeting from Cwm Avon Copper Works
before 1862
Slag from the run-down silver powder. (Parkes' Process) Llanelly Lead Works
1859
Result of fusing three equivalents of litharge with one of silica
before 1889
Thin matt, "Kupferlieh," Freiberg
before 1889
Defective brass, splitting along the centre. Made from Burra-Burra ore
before 1889
Result of fusing one equivalent of impure litharge with one of silica
before 1889
Ingot of lead after softening (Parkes' Process) From the Llanelly Lead Works
1859
Brass ship-bolt, showing highly crystalline fracture
before 1889
Metal-furnace slag, "Spurschlacke," Hettstedt
before 1889
Oxide from near the charging door of the silver blast furnace in Cordurie's process. Par Smelting Works
1870
Brass tube from "Thistle" engine, after eighteen months use
before 1889
A piece of brass which cannot be annealed
before 1889
Best selected copper, melted under charcoal and cast into an ingot mould
before 1889
Result of fusing two equivalents of litharge with one of silica
before 1889
Brass tube used in "Sittingbourne" engine, till replacement needed
before 1889
Wire and foil copper from copper which had been melted in charcoal
before 1889
Six times roasted regulus, "Gaarrost,", Hettstedt
before 1889
Black copper, Hettstedt Copper Works
before 1889
Roasted thin matt, "Gerostete Kupferlieh," Freiberg
before 1889
Undulating markings on brass
1848
Copper cemented in charcoal powder
before 1889
Thrice roasted regulus, "Spurstein," Hettstedt
before 1889
Four times roasted regulus, "Spurstein,", "Hettstedt
before 1889
Sample of old Muntz metal sheathing, badly corroded. Removed May 1875
before 1889
Copper slag, "Schlacke,", Mansfeld
before 1889
Best selected copper from Messrs. Newton and Co.
1849
Piece of embossed ornamental brass work, Keswick, 1885
before 1889
Result of bad copper being used in brass making
before 1889
Best selected copper from Messrs. Newton and Co.
1848
Metal-furnace regulus
before 1889
Brass wire which has become brittle by keeping for about one year
before 1889
Metal-furnace regulus
before 1889